Lap-joint for packings.



J. T. WILSON.

LAP JOINT FOR PAOKINGS.

APPLICATION FILED MAR. s, 1909.

942,024,, Patented Nov. 30, 1909.

2 SHEET88HBBT 1.

P WITNESSES J. T. WILSON.

LAP JOINT FOR PAUKINGS.

APPLIOATIOH rum MAILG, 1909,

942,024. Patented Nov. 30, 1909.

2 SHEIITS-SHEET 2.

I! N E5 5155 1 N VENTOR 416W WQM 6 6? MW A ES PATENT OFFICE.

JOHN T. WILSON, OF JERSEY SHORE, PENNSYLVANIA.

LAP'JOINT FOR PACKINGS.

o-l-aoal.

Application filed March 6, 1909.

To all whom it may concern:

lie it known that, I, John T. \Vinsoiv, a citizen of the United States, residing at rlerscy Shore, in the county of Lyeoming and State of Pennsylvania, have invented certain new and useful Improvements in Lap-Joints for lacliings, of which the following is a specification.

The object of my invention is the provision of an improved lap joint for packing rings generally, such as are used in connection with pistons and piston valves, and in combination with other devices where a fluid or steam-tight joint is requisite.

The invention consists in certain novelties of construction and combinations of parts as hereinafter set forth and claimed.

The accompanying drawings illustrate two examples of the physical embodiment of the invention constructed according to the best modes I have so far devised for the practical application of the principle.

Figure 1 is a plan view of a piston snap ring having the improved 1a joint. Fig. 2 is an enlarged section of Pig. 1. Fig. 3 shows the opposite side of Fig. 2. Figs. 1, 5, 6, 7, S and 9 are sections on lines A, B, C, l), E, F of Fig. 3. Fig. 10 is a perspective view of the joint plate. Fig. 11 shows asecond example, the same being a section of a packing ring. Fig. 12 shows the opposite side of Fig. 11. Figs. 13, 14 and 15 are sec tions on lines G, H, I of Fig. 12. Fig. 16 is a perspective view of the second form of the oint plate.

The numeral 1 desi nates one end of a packing ring; 2, the a jacent end which in practice is adapted to move toward and away from the end 1; or end 1 may have movement relative to end 2; or both ends may be adapted to move; 3, an integral joint plate made separate from the ends, or the entire .late may be comprised of parts immovab y connected; 4, the bottom plate; 5, the side plate of less length than the bottom plate so one end of the latter will project some distance; 6, holes at one end of the bottom plate; 7, holes at one end of the side plate; 8, two threaded holes at the inner surface of end 1 0f the ring; 9, two screws passed through holes 6 in the bottom plate and seated Within the holes 8, as shown; 10, a recess formed by cutting away part of the material at the side of end 1 for a suitable distance to receive one end of the side plate 5, the other end projecting beyond the end Specification of Letters Patent.

Patented Nov. 30, 1909.

Serial No. 481,728.

1 for a suitable distance; 11, two holes through end 1 in line with holes 7 of the side plate; .12, rivets passed through the holes ll and T and headed and countersunk so as to firmly secure the side plate to the end 1, said rivets with the screws 9 connecting the joint plate bodily to the end of the ring and so that the periphery and side of the. ring will present plain and continuous surfaces; 13, a recess formed by cutting away part of the material at the side of end 2 of the ring and sulliciently deep to receive the free end of the side plate 5 so that when the latter is in frictional contact with the surface delining the recess the top edge of the plate will be in line with the top surface of the end 2 and the side surface of the plate lie in the same plane as the side surface of the ring; 14, a normally open space between the adjacent ends 1 and 2 of the packing or ring; 15, a normally open space between the free end of side plate 5 and the surface 16 bonnding the recess formed in end 2 of the ring; and 17 is the free end of bottom plate 4 extended beyond the side plate 5 and also beyond and beneath the open space 15 and in frictional contact with the inner surface of the end 2 of the ring.

As thus far described, the two examples are substantially or generically the same and have functions the same. Obviously, the end 1 of the ring carrying the joint plate can approach and recede from the adjacent end 2 or each or both ends move in contracting and expanding and a steam or fluidtight joint be maintained.

On reference to the second example, Figs. 11 to 16, it will be seen that the opposite surfaces of the bottom plate, and the opposite surfaces of the side plate, are in parallel planes, and that the side surfaces of the recesses in the ends 1 and 2 are of a shape corresponding to the shape of the side plate so that when the parts are united plain side and top surfaces are presented or formed. This example is especially adapted for use in connection with pistons and piston valves which have a groove or grooves to receive the ring or rings in frictional contact with the side surfaces bounding a groove, and obviously the lap joint of the ring, when so used, Will not bind in expanding and contracting.

In the first exam le, which shows a ring especially adapted or use as an element of a compound packing for a piston valve, it

is desirable that the width of the outer bearing surface at X shall be as wide as possible, or that the sectional area of the recess at Y shall be as small as possible, so to secure this end. I have varied the con struction as follows: The surface 18 of the side plate is beveled or inclined and the side surfaces detinii'ig the recesses at the ends 1 and 2 ot' the ring are also beveled or inclined to match the surface 18 and lie in close frictional Contact therewitl'i.

()n reference to Fig. It it will be observed that the top corner edge of the packing from t) to O is in a continuous line, or substantially so, even where it crosses the space at Y, consequently when this edge passes the edge of a port there is no break or notch tor the premature blowing through oi the steam.

In the examples shown the bottom plate and side plate are integral or ii'nmovably united and the side plate shorter than the bottom plate. In all cases it; is desirable that the end 17 of the bottom plate shall project beyond the side plate so it can ex tend beyond the recess in the side of end 2 of the ring or packin VVhat'. I claim is:

1. A lap joint for a packing comprising two ends 1 and 2 of a packing, and a joint plate having a bottom plate and a side plate united, the side surfaces only of the ends 1 and 2 being recessed to receive the side plate, and said joint plate secured to one of the said ends.

2. Alap joint for a packing comprising two ends 1 and 2 of a packing, and a joint plate havinga bottom plat e and a side plate united, the side .Slll'ttltft'H ot. the ends 1 and being recessed to receive the side plate, and said joint plate secured to one ol' the said ends; the end 17 ot' the bottom plate projecting beyond the side plate, and trictionallv engaging the under surlace ol' end 2, in subst anee as set lorth.

3. A lap joint tor a packing comprising two ends 1 and 2 of a packing, and a joint plate having a bottom plate and a side plate one snrlace of which is beveled or inclined and said plates united, the side. surfaces of the ends 1 and 2 being recessed and provided with beveled or inclined snrtaees,

and said joint plate secured to one of the said ends; the end lT ot' the bottom plate projecting beyond the side plate and trietionally engaging the under surl'ace of end 2, in substance as set forth.

4. A lap joint for a packing comprising two ends I and 2 of a packing, and a joint plate having a bottom plate and a side plate united said bottom plate having its ends extended beyond each end of the side plate. the side surfaces of the ends t and 2 being recessed to receive the side plate, and said plate;secured}o ng of the tllltTSOddlU bottom plate will lie in frictional contact with the inner surfaces of the said two ends.

In testimony whereof I atlix my signature in presence of two witnesses.

JO [IN T. VILSUN. it it nesses Bauer. HARLAN, lt. M. Bone. 

